Care Of Component Materials; Stainless Steel Corrosion; Elastomer Seal Replacement Following Passivation - SPX FLOW W70 Series Instruction Manual

Care of Materials

Care of Component Materials

NOTE: SPX FLOW recommends the use of an FDA-approved anti-seize compound on all threaded
connections.
WARNING
Failure to comply with the Care of Component Materials could lead to bodily injury.

Stainless Steel Corrosion

Elastomer Seal
Replacement Following
Passivation
Page 8
Waukesha Cherry-Burrell
Corrosion resistance is greatest when a layer of oxide film is
formed on the surface of stainless steel. If film is disturbed or
destroyed, stainless steel becomes much less resistant to
corrosion and may rust, pit or crack.
Corrosion pitting, rusting and stress cracks may occur due to
chemical attack. Use only cleaning chemicals specified by a
reputable chemical manufacturer for use with stainless steel. Do
not use excessive concentrations, temperatures or exposure
times. Avoid contact with highly corrosive acids such as
hydrofluoric, hydrochloric or sulfuric. Also avoid prolonged
contact with
presence of acid. If chlorine-based sanitizers are used, such as
sodium hypochlorite (bleach), do not exceed concentrations of
150 ppm available chlorine, do not exceed contact time of 20
minutes, and do not exceed temperatures of 104°F (40°C).
Corrosion discoloration, deposits or pitting may occur under
product deposits or under gaskets. Keep surfaces clean,
including those under gaskets or in grooves or tight corners.
Clean immediately after use. Do not allow equipment to set idle,
exposed to air with accumulated foreign material on the surface.
Corrosion pitting may occur when stray electrical currents come
in contact with moist stainless steel. Ensure all electrical devices
connected to the equipment are correctly grounded.
Passivation chemicals can damage product contact areas of this
equipment. Elastomers (rubber components) are most likely to be
affected. Always inspect all elastomer seals after passivation is
completed. Replace any seals showing signs of chemical attack.
Indications may include swelling, cracks, loss of elasticity or any
other noticeable changes when compared with new components.
95-03087
®
Brand W70 Series Mix Proof Valves
chloride-containing chemicals, especially in
10/2023